Plate spring energy storage type electric drive axle lifting system

Abstract

The invention provides a plate spring energy storage type electric drive axle lifting system which comprises a vehicle frame, a plate spring assembly, a clamping assembly and an electric drive axle, the vehicle frame is provided with two longitudinal beams, the two ends of the plate spring assembly are movably connected with the two longitudinal beams respectively, the plate spring assembly is connected with the electric drive axle through the clamping assembly, and the electric drive axle is connected with the plate spring assembly through the clamping assembly. Therefore, the electric drive axle ascends or descends relative to the frame. According to the plate spring energy storage type electric drive bridge lifting system, the plate spring occupies a small space, so that the plate spring can be matched with a narrow space around the electric drive bridge, vertical movement of the electric drive bridge can be achieved without arranging a lifting air bag, and normal use of the electric drive bridge is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle suspension, and in particular to a leaf spring energy storage type electric drive axle lifting system. Background Art

[0002] The main load-bearing component of the air suspension is the air spring (airbag), which has many advantages such as low frequency deviation, good vehicle smoothness, unchanged chassis height when empty and fully loaded, and adjustable chassis height. Therefore, it is widely used in heavy-duty vehicles. For pure electric heavy-duty trucks, the use of electric drive axles is an important technical route. The drive motor and reducer are integrated on both sides of the bridge shell of the electric drive axle. There is no drive shaft between the two electric drive axles. When the vehicle is unloaded, if one of the electric drive axles can be lifted off the ground and only the other electric drive axle is used for driving, it can effectively save electricity and reduce tire wear. However, since the motors and transmissions on both sides of the electric drive axle occupy a large space, traditional lifting airbags cannot be arranged, which limits the lifting function of the electric drive axle. Therefore, there is an urgent need for a structure that can achieve electric drive axle lifting without increasing additional space requirements. Summary of the invention

[0003] The present invention provides a leaf spring energy storage type electric drive axle lifting system, which is used to solve the defect in the prior art that the small installation space around the electric drive axle limits the lifting of the electric drive axle, and realizes the lifting of the electric drive axle by using a leaf spring with a small volume.

[0004] The present invention provides a leaf spring energy storage type electric drive axle lifting system, comprising: a vehicle frame having two longitudinal beams; A leaf spring assembly, the two ends of which are movably connected to the two longitudinal beams respectively; A clamping assembly and an electric drive axle, wherein the leaf spring assembly and the electric drive axle are connected via the clamping assembly so that the electric drive axle can rise or fall relative to the vehicle frame.

[0005] In some embodiments, the clamping assembly includes a first clamping member and a second clamping member, the first clamping member is connected to the frame, the first clamping member has a first clamping surface, the second clamping member is connected to the top of the electric drive bridge, and the second clamping member has a second clamping surface; The leaf spring assembly includes a leaf spring sandwiched between the first clamping surface and the second clamping surface.

[0006] In some embodiments, the first clamping surface includes a first plane area and a first avoidance area, and two first avoidance areas are arranged on both sides of the first plane area in the extension direction of the leaf spring; The second clamping surface includes a second plane area and a second avoidance area, and the two second avoidance areas are arranged on both sides of the second plane area in the extension direction of the leaf spring; The first plane area and the second plane area are arranged opposite to each other and respectively fit with two surfaces of the leaf spring. The two first avoidance areas correspond to the two second avoidance areas one by one and are both arranged at intervals from the surface of the leaf spring.

[0007] In some embodiments, the first avoidance area is gradually bent in a direction away from the surface of the leaf spring in a direction away from the first plane area; The second avoidance area is gradually bent in a direction away from the second plane area and away from the surface of the leaf spring.

[0008] In some embodiments, the leaf spring assembly includes two connecting components, which are respectively arranged at two ends of the leaf spring, and the leaf spring is rotatably connected to the longitudinal beam through the connecting components.

[0009] In some embodiments, the connecting component comprises: A bushing, wherein the axial direction of the bushing is consistent with the extension direction of the longitudinal beam, the bushing comprises an outer shell and an inner shell, the inner shell is inserted into the outer shell and can rotate relative to the outer shell, the bushing comprises an upper bushing and a lower bushing, the outer shell of the upper bushing is fixedly connected to the longitudinal beam, and the outer shell of the lower bushing is fixedly connected to the leaf spring; A hanging plate, one end of which is fixedly connected to the inner shell of the upper bushing, and the other end of which is fixedly connected to the inner shell of the lower bushing.

[0010] In some embodiments, both ends of the leaf spring are provided with an annular portion, and the annular portion is fixedly connected to the outer shell of the lower bushing.

[0011] In some embodiments, the leaf spring energy storage type electric drive axle lifting system includes a connecting rod assembly, and the connecting rod assembly and the electric drive axle are respectively arranged on both sides of the clamping assembly; The connecting rod assembly includes a first rod and a second rod, one end of the first rod and one end of the second rod are rotatably connected to the two longitudinal beams respectively, and the other end of the first rod and the other end of the second rod are rotatably connected to the first clamping member.

[0012] In some embodiments, the leaf spring energy storage electric drive axle lifting system includes a connecting shaft, one end of which is fixedly connected to the first clamping member, and the first rod and the second rod are both hingedly connected to the connecting shaft.

[0013] In some embodiments, the leaf spring energy storage electric drive axle lifting system includes a load-bearing airbag, the load-bearing airbag is connected to the frame, a plurality of the load-bearing airbags are provided, and the plurality of the load-bearing airbags are arranged at intervals.

[0014] The leaf spring energy storage electric drive axle lifting system of the embodiment of the present invention has a leaf spring that occupies a small space, so it can fit into the narrow space around the electric drive axle. The electric drive axle can be moved up and down without arranging lifting airbags, thereby ensuring the normal use of the electric drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of the leaf spring energy storage type electric drive axle lifting system provided by the present invention.

[0017] Figure 2 It is a cross-sectional schematic diagram of the leaf spring energy storage type electric drive axle lifting system provided by the present invention.

[0018] Figure 3 It is a structural schematic diagram of a bushing of a leaf spring energy storage electric drive axle lifting system provided by the present invention.

[0019] Figure 4 It is a schematic structural diagram of the leaf spring assembly of the leaf spring energy storage electric drive axle lifting system provided by the present invention in a free state and a stressed state.

[0020] Figure 5 It is a schematic diagram of the leaf spring energy storage electric drive axle lifting system provided by the present invention in the initial assembly state.

[0021] Figure 6 It is a schematic diagram of the leaf spring energy storage electric drive axle lifting system provided by the present invention when the electric drive axle is in the lifting state.

[0022] Figure 7 It is a schematic diagram of the leaf spring energy storage electric drive axle lifting system provided by the present invention in a fully loaded state.

[0023] Figure 8 It is a structural schematic diagram of the connection between the clamping assembly and the leaf spring of the leaf spring energy storage electric drive axle lifting system provided by the present invention.

[0024] Fig. 9 It is a schematic diagram of the cross-sectional structure of a bushing of the leaf spring energy storage electric drive axle lifting system provided by the present invention.

[0025] Reference numerals: 1. Frame; 11. Longitudinal beam; 111. Limit block; 2. Leaf spring assembly; 21. Leaf spring; 211. Ring portion; 212. Reinforcement member; 22. Connecting member; 221. Upper bushing; 222. Lower bushing; 23. Bushing; 231. Outer shell; 232. Inner shell; 233. Rubber layer; 24. Hanging plate; 3. Clamping assembly; 31. First clamping member; 311. First clamping surface; 3111. First plane area; 3112. First avoidance area; 32. Second clamping member; 321. Second clamping surface; 3211. Second plane area; 3212. Second avoidance area; 4. Electric drive axle; 5. Connecting rod assembly; 51. First rod; 52. Second rod; 6. Connecting shaft; 7. Load-bearing airbag. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 9 As shown, an embodiment of the present invention discloses a leaf spring energy storage electric drive axle lifting system, including a vehicle frame 1, a leaf spring assembly 2, a clamping assembly 3 and an electric drive axle 4.

[0028] The vehicle frame 1 has two longitudinal beams 11 .

[0029] Both ends of the leaf spring assembly 2 are movably connected to the two longitudinal beams 11 respectively.

[0030] The leaf spring assembly 2 and the electric drive axle 4 are connected via the clamping assembly 3 so that the electric drive axle 4 can rise or fall relative to the vehicle frame 1 .

[0031] For ease of description, the up-down direction, left-right direction, and front-back direction are as shown in Figure 1 shown.

[0032] The vehicle frame 1 has two longitudinal beams 11 arranged at intervals in the left-right direction, and the extension direction of the longitudinal beams 11 is consistent with the front-back direction. The leaf spring assembly 2 has a leaf spring 21, and the extension direction of the leaf spring 21 is consistent with the left-right direction. The two ends of the leaf spring 21 are respectively connected to the two longitudinal beams 11, and the leaf spring 21 is movably connected to the longitudinal beams 11, so that the leaf spring 21 can move in the up-down direction relative to the longitudinal beams 11. The electric drive axle 4 is arranged below the vehicle frame 1, and the leaf spring 21 and the electric drive axle 4 are connected through the clamping assembly 3. The leaf spring 21 can be arched upward or downward, so as to adapt to the lifting and lowering of the electric drive axle 4.

[0033] In the related art, since the motors and transmissions on both sides of the electric drive axle occupy a large space, traditional lifting airbags cannot be arranged, thus limiting the lifting function of the electric drive axle.

[0034] In the leaf spring energy storage type electric drive bridge lifting system of the embodiment of the present invention, the leaf spring 21 occupies a small space, so that it can fit into the narrow space around the electric drive bridge 4, so that the electric drive bridge 4 can move up and down, thereby realizing the lifting of the electric drive bridge 4. The electric drive bridge 4 can be moved up and down without arranging a lifting airbag, thereby ensuring the normal use of the electric drive bridge 4.

[0035] In some embodiments, the clamping assembly 3 includes a first clamping member 31 and a second clamping member 32 , wherein the first clamping member 31 is connected to the frame 1 and has a first clamping surface 311 , and the second clamping member 32 is connected to the top of the electric drive bridge 4 and has a second clamping surface 321 .

[0036] The leaf spring assembly 2 includes a leaf spring 21 , and the leaf spring 21 is clamped between a first clamping surface 311 and a second clamping surface 321 .

[0037] For example, Figure 2 As shown, the first clamping member 31 is arranged above the second clamping member 32, the first clamping surface 311 of the first clamping member 31 is arranged downward, and the second clamping surface 321 of the second clamping member 32 is arranged upward.

[0038] The leaf spring 21 is clamped between the first clamping surface 311 and the second clamping surface 321. For example, threaded holes are provided on the first clamping surface 311, the leaf spring 21 and the second clamping surface 321. Bolts are used to fix the first clamping surface 311, the leaf spring 21 and the second clamping surface 321 together, so that the leaf spring 21 and the electric drive bridge 4 can be tightly connected together.

[0039] Optionally, in order to ensure structural strength, both the front and rear sides of the first clamping surface 311 are provided with a first fitting surface, and the first clamping surface 311 is higher than the first fitting surface. Both the front and rear sides of the second clamping surface 321 are provided with a second fitting surface, and the second clamping surface 321 is lower than the second fitting surface. The first fitting surface and the second fitting surface can be closely fitted. For example, a plurality of threaded holes are provided on the first fitting surface and the second fitting surface, and the first fitting surface and the second fitting surface are connected by bolts.

[0040] In some embodiments, the first clamping surface 311 includes a first plane area 3111 and a first avoidance area 3112 , and the two first avoidance areas 3112 are arranged on both sides of the first plane area 3111 in the extension direction of the leaf spring 21 .

[0041] The second clamping surface 321 includes a second plane area 3211 and a second avoidance area 3212 . The two second avoidance areas 3212 are arranged on both sides of the second plane area 3211 in the extension direction of the leaf spring 21 .

[0042] The first plane area 3111 and the second plane area 3211 are arranged opposite to each other and respectively fit with two surfaces of the leaf spring 21 . The two first avoidance areas 3112 and the two second avoidance areas 3212 correspond one to one and are both arranged at intervals from the surface of the leaf spring 21 .

[0043] For example, Figure 2 and Figure 8 As shown, the two sides in the extension direction of the leaf spring 21 are the left side and the right side. The left side and the right side of the first plane area 3111 are both the first avoidance area 3112 , and the left side and the right side of the second plane area 3211 are both the second avoidance area 3212 .

[0044] The first plane area 3111 and the second plane area 3211 are arranged opposite to each other in the up-down direction, so that the leaf spring 21 is sandwiched between the first plane area 3111 and the second plane area 3211. Since the surfaces of the first plane area 3111 and the second plane area 3211 are both planes, they can fit closely with the surface of the leaf spring 21, which not only ensures the stability of the leaf spring 21 when bearing a load, but also reduces stress concentration and unnecessary wear caused by uneven surfaces.

[0045] The first avoidance area 3112 on the left side corresponds to the second avoidance area 3212 on the left side, and the first avoidance area 3112 on the right side corresponds to the second avoidance area 3212 on the right side, and the first avoidance area 3112 and the second avoidance area 3212 are arranged at intervals from the surface of the leaf spring 21. On the one hand, this spacing arrangement ensures that the leaf spring 21 can move flexibly within the normal working range without being hindered or restricted by the first avoidance area 3112 or the second avoidance area 3212. When the vehicle encounters different road conditions and load changes during driving, the leaf spring 21 can deform quickly as needed, absorb vibrations and transmit force, thereby ensuring the smooth up and down movement of the electric drive bridge 4. On the other hand, when the movement amplitude of the leaf spring 21 is large, such as when significant bending occurs under extreme load conditions, the first avoidance area 3112 and the second avoidance area 3212 can play a limiting role, effectively limiting the bending amplitude of the leaf spring 21, preventing it from excessive deformation or even bending, and protecting the leaf spring 21 from permanent damage.

[0046] Optionally, two reinforcement members 212 are provided on the leaf spring 21 , and the two reinforcement members 212 correspond to the first plane area 3111 and the second plane area 3211 , respectively, so as to enhance the structural strength of the leaf spring 21 .

[0047] In some embodiments, the first avoidance area 3112 is gradually bent in a direction away from the surface of the leaf spring 21 in a direction away from the first planar area 3111 .

[0048] The second avoidance area 3212 is gradually bent in a direction away from the surface of the leaf spring 21 in a direction away from the second plane area 3211 .

[0049] For example, Figure 2 As shown, the surfaces of the first avoidance area 3112 and the second avoidance area 3212 are both arc surfaces. Therefore, the arc surface shape of the first avoidance area 3112 and the second avoidance area 3212 prevents unnecessary contact or friction between them and the leaf spring 21, thereby avoiding wear and damage caused by excessive constraint of the leaf spring 21, which not only improves the smoothness of the movement of the leaf spring 21, but also reduces noise and vibration, thereby improving the overall performance of the leaf spring energy storage electric drive axle lifting system.

[0050] In some embodiments, the leaf spring assembly 2 includes two connecting components 22 , which are respectively disposed at two ends of the leaf spring 21 , and the leaf spring 21 is rotatably connected to the longitudinal beam 11 via the connecting components 22 .

[0051] For example, Figure 2 As shown, the leaf spring 21 can be rotatably connected to the longitudinal beam 11 of the frame 1 through these connecting parts 22. Each connecting part 22 is designed with an appropriate structure, such as a lifting lug or a hinge point, to ensure that the leaf spring 21 can rotate relative to the longitudinal beam 11, so as to adapt to different load changes and road conditions. This rotatable connection method not only allows the leaf spring 21 to flexibly deform as needed, but also reduces stress concentration and structural damage that may be caused by rigid connection.

[0052] In some embodiments, the connecting member 22 includes a bushing 23 and a hanger plate 24 .

[0053] The axial direction of the bushing 23 is consistent with the extension direction of the longitudinal beam 11. The bushing 23 includes an outer shell 231 and an inner shell 232. The inner shell 232 is inserted into the outer shell 231 and can rotate relative to the outer shell 231. The bushing 23 includes an upper bushing 221 and a lower bushing 222. The outer shell 231 of the upper bushing 221 is fixedly connected to the longitudinal beam 11, and the outer shell 231 of the lower bushing 222 is fixedly connected to the leaf spring 21.

[0054] One end of the hanging plate 24 is fixedly connected to the inner shell 232 of the upper bushing 221 , and the other end of the hanging plate 24 is fixedly connected to the inner shell 232 of the lower bushing 222 .

[0055] like Figure 2 and Figure 3As shown, the axial direction of the bushing 23 is consistent with the front-rear direction, and the upper bushing 221 is fixed to the longitudinal beam 11 by welding, clamping or bolting. For example, the upper bushing 221 includes a fixing seat, the outer shell 231 is welded or clamped on the fixing seat, and the fixing seat is connected to the longitudinal beam 11 by bolts.

[0056] The lower bushing 222 is disposed below the upper bushing 221 and is spaced apart from the upper bushing 221. The outer shell 231 of the lower bushing 222 is fixedly connected to the leaf spring 21, and the inner shell 232 of the upper bushing 221 and the inner shell 232 of the lower bushing 222 are fixedly connected via the hanging plate 24.

[0057] Therefore, when the leaf spring 21 moves slightly, the outer shell 231 of the lower bushing 222 moves with the leaf spring 21. Since the inner shell 232 of the lower bushing 222 can rotate relative to the outer shell 231, the inner shell 232 of the lower bushing 222 does not move, and the hanging plate 24 and the upper bushing 221 do not move either.

[0058] When the leaf spring 21 moves in a large range, the outer shell 231 of the lower bushing 222 moves with the leaf spring 21. Even if the inner shell 232 of the lower bushing 222 can rotate relative to the outer shell 231, due to the large movement of the leaf spring 21, the inner shell 232 of the lower bushing 222 will also be affected to a certain extent and move accordingly. At this time, the hanging plate 24 moves with the inner shell 232 of the lower bushing 222, and then drives the inner shell 232 of the upper bushing 221 to rotate relative to the outer shell 231 of the upper bushing 221, thereby offsetting the movement transmitted through the hanging plate 24.

[0059] In some embodiments, both ends of the leaf spring 21 are provided with an annular portion 211 , and the annular portion 211 is fixedly connected to the outer shell 231 of the lower bushing 222 .

[0060] For example, Figure 2 As shown, both ends of the leaf spring 21 are provided with annular portions 211 , which are fixedly connected to the outer shell 231 of the lower bushing 222 , and the annular portions 211 are used to facilitate the installation of the lower bushing 222 .

[0061] In some other embodiments, a rubber layer 233 is disposed between the inner shell 232 and the outer shell 231 , and the inner shell 232 and the outer shell 231 are both fixedly connected to the rubber layer 233 .

[0062] For example, Figure 3As shown, in order to further improve the shock absorption performance and durability of the connecting component 22, a rubber layer 233 is provided between the inner shell 232 and the outer shell 231, and the inner shell 232 and the outer shell 231 are fixedly connected to the rubber layer 233. The existence of the rubber layer 233 not only provides a good shock absorption effect, but also has a certain elasticity and can be torsionally deformed, so that the inner shell 232 can rotate relative to the outer shell 231, and can also restore to its original shape after deformation, so that the inner shell 232 can be reset.

[0063] In some embodiments, the leaf spring energy storage electric drive axle lifting system includes a connecting rod assembly 5 , and the connecting rod assembly 5 and the electric drive axle 4 are respectively arranged on both sides of the clamping assembly 3 .

[0064] The connecting rod assembly 5 includes a first rod 51 and a second rod 52 . One end of the first rod 51 and one end of the second rod 52 are rotatably connected to the two longitudinal beams 11 respectively, and the other ends of the first rod 51 and the second ends of the second rod 52 are rotatably connected to the first clamping member 31 .

[0065] For example, Figure 1 As shown, the first rod 51 and the second rod 52 form a V shape, the rear end of the first rod 51 is hingedly connected to the longitudinal beam 11, the rear end of the second rod 52 is hingedly connected to the longitudinal beam 11, and the front end of the first rod 51 and the front end of the second rod 52 are hingedly connected to the first clamping member 31. Therefore, the connecting rod assembly 5 can provide a certain supporting force for the first clamping member 31, thereby providing a certain supporting force for the leaf spring 21, and further assisting the movement of the electric drive bridge 4.

[0066] Optionally, the front end of the first rod 51 and the front end of the second rod 52 are fixedly connected, and the first rod 51 and the second rod 52 are integrally formed.

[0067] In some embodiments, the leaf spring energy storage electric drive axle lifting system includes a connecting shaft 6 , one end of which is fixedly connected to the first clamp 31 , and the first rod 51 and the second rod 52 are both hingedly connected to the connecting shaft 6 .

[0068] For example, Figure 2 As shown, the connecting shaft 6 extends in the up-down direction, the bottom of the connecting shaft 6 is fixedly connected to the first clamping member 31, and the top of the connecting shaft 6 is provided with an end cover, which can prevent the first rod 51 and the second rod 52 from slipping off.

[0069] In some embodiments, the leaf spring energy storage electric drive axle lifting system includes a load-bearing airbag 7 , which is connected to the vehicle frame 1 , and a plurality of load-bearing airbags 7 are provided, and the plurality of load-bearing airbags 7 are arranged at intervals.

[0070] For example, Figure 1As shown, each longitudinal beam 11 is provided with two airbags arranged at intervals in the front-to-rear direction, and the electric drive axle 4 is provided between the two airbags. Therefore, when the vehicle is fully loaded, the airbags are inflated to increase the supporting force; and when the vehicle is unloaded, the airbags are deflated. The multi-airbag design allows each airbag to be adjusted independently, so as to better adapt to different load distributions and road conditions, ensuring that the vehicle can maintain stable driving performance under various working conditions.

[0071] Optionally, a limit block 111 is provided on the outer side of the longitudinal beam 11 to limit the movement of the electric drive axle 4 .

[0072] like Figures 5 to 7 As shown, the leaf spring energy storage electric drive axle lifting system has three working states. The first state is the initial assembly state, at which the leaf spring 21 is in a zero-load free state, and there is still a certain gap between the electric drive axle 4 and the limit block 111 to ensure that the leaf spring 21 can be assembled smoothly.

[0073] The second state is the lifting state of the electric drive bridge 4. When the vehicle is traveling without load, the load-bearing airbag 7 is not inflated, and the gravity of the electric drive bridge 4 causes the leaf spring 21 in a free state to deform until the elastic force of the leaf spring 21 is balanced with the gravity of the electric drive bridge 4. At this time, the leaf spring 21 is approximately in a straight state.

[0074] The third state is the fully loaded driving state. When the vehicle is fully loaded, the electric drive bridge 4 is not allowed to be lifted. At this time, the air suspension control system (EC leaf spring energy storage type electric drive bridge lifting system S) inflates the load-bearing airbag 7, and the generated airbag pressure acts on the electric drive bridge 4, forcing the leaf spring 21 to bend back, so that the electric drive bridge 4 contacts the ground. As the air supply pressure increases, the force generated by the load-bearing airbag 7 is used for bearing in addition to offsetting the elastic force of the leaf spring 21. When the load-bearing airbag 7 is deflated, the elastic potential energy stored in the deformation of the leaf spring 21 lifts the electric drive bridge 4, so that the electric drive bridge 4 re-enters the lifting state.

[0075] When the vehicle is fully loaded, the air pressure of the load-bearing airbag 7 is used to deform the leaf spring 21. When the vehicle is unloaded and the electric drive bridge 4 needs to be lifted, the air pressure of the load-bearing airbag 7 is released, and the elastic potential energy of the leaf spring 21 is used to lift the electric drive bridge 4. When the vehicle is fully loaded, the suspension height (i.e., the distance between the center line of the electric drive bridge 4 and the lower wing surface of the frame 1) is H, the lifting amount is H1, and the suspension height after the electric drive bridge 4 is lifted is (H-H1). The deformation amount of the leaf spring 21 to overcome the gravity of the electric drive bridge 4 is H2, so in the initial assembly state, there is no effect of the gravity of the electric drive bridge 4, and the suspension height is (H-H1-H2).

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A leaf spring energy storage electric drive axle lifting system, characterized in that: include: a vehicle frame having two longitudinal beams; A leaf spring assembly, wherein two ends of the leaf spring assembly are movably connected to the two longitudinal beams respectively; A clamping assembly and an electric drive axle, wherein the leaf spring assembly and the electric drive axle are connected via the clamping assembly so that the electric drive axle can rise or fall relative to the vehicle frame.

2. The leaf spring energy storage electric drive axle lifting system according to claim 1 is characterized in that: The clamping assembly includes a first clamping member and a second clamping member, wherein the first clamping member is connected to the vehicle frame and has a first clamping surface, and the second clamping member is connected to the top of the electric drive bridge and has a second clamping surface; The leaf spring assembly includes a leaf spring sandwiched between the first clamping surface and the second clamping surface.

3. The leaf spring energy storage electric drive axle lifting system according to claim 2 is characterized in that: The first clamping surface includes a first plane area and a first avoidance area, and two first avoidance areas are arranged on both sides of the first plane area in the extension direction of the leaf spring; The second clamping surface includes a second plane area and a second avoidance area, and the two second avoidance areas are arranged on both sides of the second plane area in the extension direction of the leaf spring; The first plane area and the second plane area are arranged opposite to each other and respectively fit with two surfaces of the leaf spring. The two first avoidance areas correspond to the two second avoidance areas one by one and are both arranged at intervals from the surface of the leaf spring.

4. The leaf spring energy storage electric drive bridge lifting system according to claim 3 is characterized in that: The first avoidance area gradually bends in a direction away from the first plane area and in a direction away from the surface of the leaf spring; The second avoidance area is gradually bent in a direction away from the second plane area and away from the surface of the leaf spring.

5. The leaf spring energy storage electric drive bridge lifting system according to any one of claims 2-4, characterized in that: The leaf spring assembly includes two connecting components, which are respectively arranged at two ends of the leaf spring, and the leaf spring is rotatably connected to the longitudinal beam through the connecting components.

6. The leaf spring energy storage electric drive axle lifting system according to claim 5, characterized in that: The connecting component comprises: A bushing, wherein the axial direction of the bushing is consistent with the extension direction of the longitudinal beam, the bushing comprises an outer shell and an inner shell, the inner shell is inserted into the outer shell and can rotate relative to the outer shell, the bushing comprises an upper bushing and a lower bushing, the outer shell of the upper bushing is fixedly connected to the longitudinal beam, and the outer shell of the lower bushing is fixedly connected to the leaf spring; A hanging plate, one end of which is fixedly connected to the inner shell of the upper bushing, and the other end of which is fixedly connected to the inner shell of the lower bushing.

7. The leaf spring energy storage electric drive axle lifting system according to claim 6, characterized in that: Both ends of the leaf spring are provided with an annular portion, and the annular portion is fixedly connected to the outer shell of the lower bushing.

8. The leaf spring energy storage electric drive bridge lifting system according to any one of claims 2-4, characterized in that: The leaf spring energy storage type electric drive axle lifting system comprises a connecting rod assembly, wherein the connecting rod assembly and the electric drive axle are respectively arranged on both sides of the clamping assembly; The connecting rod assembly includes a first rod and a second rod, one end of the first rod and one end of the second rod are rotatably connected to the two longitudinal beams respectively, and the other end of the first rod and the other end of the second rod are rotatably connected to the first clamping member.

9. The leaf spring energy storage electric drive axle lifting system according to claim 8, characterized in that: The leaf spring energy storage electric drive axle lifting system comprises a connecting shaft, one end of which is fixedly connected to the first clamping member, and the first rod and the second rod are both hingedly connected to the connecting shaft.

10. The leaf spring energy storage electric drive axle lifting system according to claim 1, characterized in that: The leaf spring energy storage electric drive axle lifting system includes a load-bearing airbag, which is connected to the vehicle frame. A plurality of the load-bearing airbags are provided, and the plurality of the load-bearing airbags are arranged at intervals.

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